Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F32/00—Homopolymers and copolymers of cyclic compounds having no unsaturated aliphatic radicals in a side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic ring system
  • C08F32/08—Homopolymers and copolymers of cyclic compounds having no unsaturated aliphatic radicals in a side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic ring system having two condensed rings
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G61/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
  • C08G61/02—Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes
  • C08G61/04—Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes only aliphatic carbon atoms
  • C08G61/06—Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes only aliphatic carbon atoms prepared by ring-opening of carbocyclic compounds
  • C08G61/08—Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes only aliphatic carbon atoms prepared by ring-opening of carbocyclic compounds of carbocyclic compounds containing one or more carbon-to-carbon double bonds in the ring
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C7/00—Purification; Separation; Use of additives
  • C07C7/005—Processes comprising at least two steps in series
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C7/00—Purification; Separation; Use of additives
  • C07C7/148—Purification; Separation; Use of additives by treatment giving rise to a chemical modification of at least one compound
  • C07C7/14833—Purification; Separation; Use of additives by treatment giving rise to a chemical modification of at least one compound with metals or their inorganic compounds
  • C07C7/1485—Purification; Separation; Use of additives by treatment giving rise to a chemical modification of at least one compound with metals or their inorganic compounds oxides; hydroxides; salts
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
  • C08K3/20—Oxides; Hydroxides
  • C08K3/22—Oxides; Hydroxides of metals
• • C07C2103/68—
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C2603/00—Systems containing at least three condensed rings
  • C07C2603/56—Ring systems containing bridged rings
  • C07C2603/58—Ring systems containing bridged rings containing three rings
  • C07C2603/60—Ring systems containing bridged rings containing three rings containing at least one ring with less than six members
  • C07C2603/66—Ring systems containing bridged rings containing three rings containing at least one ring with less than six members containing five-membered rings
  • C07C2603/68—Dicyclopentadienes; Hydrogenated dicyclopentadienes
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G2261/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
  • C08G2261/30—Monomer units or repeat units incorporating structural elements in the main chain
  • C08G2261/33—Monomer units or repeat units incorporating structural elements in the main chain incorporating non-aromatic structural elements in the main chain
  • C08G2261/332—Monomer units or repeat units incorporating structural elements in the main chain incorporating non-aromatic structural elements in the main chain containing only carbon atoms
  • C08G2261/3325—Monomer units or repeat units incorporating structural elements in the main chain incorporating non-aromatic structural elements in the main chain containing only carbon atoms derived from other polycyclic systems
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G2261/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
  • C08G2261/40—Polymerisation processes
  • C08G2261/41—Organometallic coupling reactions
  • C08G2261/418—Ring opening metathesis polymerisation [ROMP]
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/02—Elements
  • C08K3/08—Metals
  • C08K2003/0818—Alkali metal
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/02—Elements
  • C08K3/08—Metals
  • C08K2003/0818—Alkali metal
  • C08K2003/0825—Potassium

Definitions

• the present invention is related to a process for treating a metathesis polymerizable monomer composition such as a dicyclopentadiene monomer-containing composition such that when the treated polymerizable monomer composition is polymerized, the composition exhibits advantageous properties.
• a metathesis polymerizable monomer composition such as a dicyclopentadiene monomer-containing composition
• DCPD dicyclopentadiene
• a monomer stream containing more than 98 percent (%) DCPD monomer must be used in order to: (a) use less DCPD monomer polymerization catalyst relative to a monomer stream containing less than 98% DCPD monomer, and (b) obtain a polymerized polymer such as polymerized DCPD (polyDCPD) having better mechanical properties relative to a monomer stream containing less than 98% DCPD monomer (e.g., higher glass transition temperature, and higher modulus).
• polyDCPD polymerized DCPD
• U.S. Pat. No. 6,020,443 discloses a method for synthesizing polyDCPD via ROMP of low grade DCPD starting materials using ruthenium or osmium carbene complex catalyst.
• the low grade DCPD starting materials contain less than 97% by weight of DCPD monomers.
• U.S. Pat. No. 6,020,443 does not provide a treatment comprising an additive to modify any of the starting materials prior to polymerization.
• ROMP process that does not require high levels (for example greater than (>) 1500 ppm) of polymerization catalyst. It would also be desirable to have a treatment process for treating a particular grade of monomer stream, such as DCPD monomer stream, containing less than 98% DCPD monomer, that would provide a polymerized product with improved performance properties such as a higher Tg, and less brittleness, compared to a polymerized product made from the untreated version of the same grade of DCPD monomer.
• a monomer treatment process has been developed which improves monomer conversion and achieves polymerized products having higher Tg values compared to control runs performed without the treatment process of the present invention.
• one of the improvements in the present invention is the use of less catalyst in a polymerization process using a treated monomer material versus the untreated form of the monomer material.
• One embodiment of the present invention is directed to a monomer treatment process including the step of treating a dicyclopentadiene monomer with an alkali metal-containing additive prior to polymerizing the monomer.
• Another embodiment of the present invention is directed to a process for polymerizing a monomer including the steps of: (a) treating a dicyclopentadiene monomer with an alkali metal-containing additive; and (b) polymerizing the treated monomer of step (a).
• the alkali metal-containing additive may remain in the polymerization process step (b), or can be separated from the dicyclopentadiene monomer prior to step (b).
• Some of the advantages of using the treatment method of the present invention may include for example, but not limited thereto: (1) a reduction in color present in the treated monomer compared to the untreated monomer, (2) a higher Tg value exhibited by a polymerized article prepared from a treated monomer when compared to a polymerized article prepared from an untreated monomer at an equivalent amount of metathesis polymerization catalyst loading, or (3) a comparable or higher Tg value exhibited by a polymerized article prepared from a treated monomer when compared to a polymerized article prepared from an untreated monomer using a lower metathesis polymerization catalyst loading than the amount of catalyst used to polymerize untreated monomer.
• One broad aspect of the present invention includes a process of treating a monomer with a treatment additive, wherein the treatment additive includes, for example, an alkali metal, an oxidized alkali metal, or mixtures thereof.
• the treatment additive may be an alkali metal, an oxidized alkali metal, or mixtures thereof coated on a support.
• the treatment process is carried out, prior to polymerization of the monomer, under process conditions such as at a predetermined temperature and for a predetermined period of time to form a treated monomer, wherein the treated monomer can be subsequently used to form a cured resin product.
• the first step of the process of the present invention includes treating a monomer, such as for example a DCPD monomer, with the treatment additive at a predetermined temperature for a predetermined period of time.
• a monomer such as for example a DCPD monomer
• the temperature of the treating step is from 10° C. to 120° C. in one embodiment, from 15° C. to 80° C. in another embodiment, and from 20° C. to 50° C. in still another embodiment
• the time of the treating step is from 1 minute to 16 hours in one embodiment, from 5 minutes to 8 hours in another embodiment, and from 20 minutes to 2 hours in still another embodiment.
• the treated monomer such as for example a treated DCPD monomer which has been treated with the treatment additive, can include low grade DCPD starting materials.
• the process of the present invention may include for example using the treated monomer in a method for synthesizing a polymer such as polyDCPD via ROMP of the low grade DCPD starting material in combination with a ROMP catalyst such as a ruthenium or osmium carbene complex catalyst, or other catalysts based on tungsten, molybdenum and titanium such as described in U.S. Pat. Nos. 4,661,575; 4,952,348; 4,994,426; and 5,319,042, each of which is incorporated herein by reference.
• the DCPD monomer useful for the polymerization process in accordance with the present invention is typically produced as a result of a process involving the high temperature cracking of petroleum fractions to make ethylene such as described by Cheung, T.T.P. 2001 “Cyclopentadiene and Dicyclopentadiene”, Kirk-Othmer Encyclopedia of Chemical Technology. Depending on the particular producer, different grades of DCPD monomer are sold commercially.
• DCPD DC-propylene
• Dow Chemical Company a product Data Sheet for Dicyclopentadiene
• DCPD Low Form #778-00101, published August 2005
• brochure entitled “Dicyclopentadiene Products A Guide to Product Handling and Use (Dow Form #778-04301, created May 2010) also available from The Dow Chemical Company.
• the three grades of DCPD commercially available from The Dow Chemical Company are listed in the following table.
• the purity of the dicylopentadiene monomer useful in the present invention is less than 95 wt %, preferably from 10 wt % to 95 wt %, more preferably from 20 wt % to 95 wt %, even more preferable from 40 wt % to 95 wt %, and most preferably from 50 wt % to 95 wt %.
• the DCPD monomer useful in the present invention can include a crude DCPD monomer having a purity of less than ( ⁇ )95% purity in one embodiment, less than 92% in another embodiment, and less than 88% in still another embodiment.
• the purity of the DCPD monomer used in the present invention may be from 75% to 100%, from 80% to 95% in still another embodiment, and from 83% to 92% in yet another embodiment.
• the type of catalysts employed in the present invention to treat the monomers may include for example the heterogeneous form of a base as described in http://signachem.com/products/by-name/alkali-metal-alumina-gel/; or in Oh et al., Bull. Korean Chem. Soc., 2008, 29(11), 2202-2203, which discloses the isomerization of 5-vinyl-2-norbomene using sodium-coated catalysts. In the present invention some olefin isomerization occurs and simultaneously, trace impurities such as the sulfur compounds are removed with the use of a supported strong base.
• the types of strong bases useful in the present invention are described in EP 279397; U.S. Pat. No. 5,981,820; WO 94/24076; and WO 00/18710.
• the treatment additive useful for treating the DCPD monomer of the present invention can be an alkali metal, an alkali metal oxide, or a mixture thereof coated on a support substrate in one embodiment.
• the treatment additive may include a sodium or potassium metal and/or metal oxide coated on a support such as alumina.
• the treatment additive may include, for example, an oxidized alkali metal such as for example Na 2 O, K 2 O, or a mixture thereof.
• the treatment additive may be used alone or may be used in a combination of two or more treatment additives.
• the treatment additive may be coated on a solid support member such as alumina, silica, carbon, zeolites, magnesium chloride, magnesium oxide, clays, nano-clays, or mixtures thereof.
• a solid support member such as alumina, silica, carbon, zeolites, magnesium chloride, magnesium oxide, clays, nano-clays, or mixtures thereof.
• the solid support includes an alumina, a silica, or a mixture thereof.
• the amount of the treatment additive used in the present invention may be in the range of from 0.1 weight percent (wt %) to 20 wt % in one embodiment, from 0.3 wt % to 8 wt % in another embodiment, and from 0.5 wt % to 6 wt % in still another embodiment, based on the total amount of metathesis polymerizable monomer.
• the treatment process of the present invention for treating a DCPD monomer may optionally include for example adding a catalyst activity modifying agent to the monomer to moderate catalyst activity.
• a catalyst activity modifying agent may include a phosphine, a silane, a pyridine, a tertiary amine, or mixtures thereof.
• the amount of catalyst activity modifying agent when used, may be in the range of from 0 wt % to 1.0 wt % in one embodiment, from 0.02 wt % to 0.6 wt % in another embodiment, and from 0.04 wt % to 0.2 wt % in still another embodiment.
• the treated monomer may optionally be followed by a step of separating the treated monomer from the treatment additive compound. Separating the treated monomer may be carried out by a variety of recovery techniques such as for example filtration, centrifugation, and distillation.
• the treated monomer may be recovered by using known filtration processes and equipment.
• the process of the present invention may include filtering the treated monomer by various filtration processes and equipment to isolate the treated monomer from the other compounds remaining after the treatment step.
• the treatment additive such as an alkali metal additive and other additives may remain with the treated monomer after the treatment step without separating (for example, by filtration) the treated monomer from the treatment additive and other additives.
• the resulting unfiltered treated monomer material can be directly polymerized, for example in a metathesis reaction, to form the polymerized product without a detrimental effect on the properties of the resultant polymerized product.
• Degassing a monomer useful in the present invention process may be done at any point or step of the process such as for example, before or after the treatment process step; before or after the separating step (e.g. filtering); or before the polymerization step.
• Degassing the monomer involves removal of dissolved gases in the monomer such as air and may be carried out by a variety of degassing techniques such as for example inert gas sparging, low pressure evacuation, freeze/pump/thaw cycles, or combinations thereof.
• the treated monomer of the present invention may exhibit several improved properties including reduced levels of nitrogen-containing compounds; reduced levels of sulfur-containing compounds; and/or reduced levels of 5-vinyl-2-norbornene (VNB), among others. It is important to reduce the levels of the above compounds because the compounds may (a) deactivate or inhibit the activation of the metathesis catalyst/initiator, (b) deactivate or inhibit the activity of the metathesis catalyst/initiator, (c) alter the molecular weight (MW) growth and cross-link density of a cured product produced from a curable composition containing the compounds, and/or (d) lead to a cured product with significant brittle characteristics.
• VNB 5-vinyl-2-norbornene
• the level of nitrogen-containing compounds in the treated monomer of the present invention may be from less than 200 ppm in one embodiment, and from less than 10 ppm in another embodiment.
• the level of sulfur-containing compounds in the treated monomer of the present invention may be less than 100 ppm in one embodiment, from 50 ppm to 1 ppm in another embodiment, and from 10 ppm to less than 1 ppm in still another embodiment.
• the level of VNB in the treated monomer of the present invention may be less than 1.5 wt % in one embodiment, from 1 wt % to 0.2 wt % in another embodiment, and from 0.9 wt % to less than 0.1 wt % in still another embodiment.
• Another broad aspect of the present invention includes a process for polymerizing the treated monomer such as a treated DCPD product.
• the treated DCPD product may be subjected to a ROMP reaction.
• the DCPD monomer stream is a treated DCPD having a purity of less than 95% DCPD purity in the ROMP reaction process.
• One advantage of the present invention is the flexibility to perform a ROMP reaction process using DCPD regardless of the purity level of the DCPD grade.
• the polymerization reaction mixture includes treated DCPD, initiators (or catalysts), co-catalysts, additional monomers capable of undergoing a metathesis reaction, reactivity control agents (for example as described in U.S. Pat. No. 5,939,504 or U.S. Pat. No. 7,060,769), viscosity modifiers, surfactants, fillers, dyes, solvents or mixtures thereof.
• the concentration of the catalyst may be reduced from 2500 ppm in the untreated DCPD monomer to 1500 ppm using the same grade of treated DCPD monomer in one embodiment, from 1500 ppm in the untreated DCPD monomer to 750 ppm using the same grade of treated DCPD monomer in another embodiment, from 750 ppm in the untreated DCPD monomer to 300 ppm using the same grade of treated DCPD monomer in still another embodiment, and from 300 ppm to 40 ppm using the same grade of treated DCPD monomer in yet another embodiment.
• the process of polymerizing a DCPD monomer useful in the present invention is known in the art.
• the treated DCPD monomer can undergo ROMP polymerization by any of the methods known in the art including for example processes involving a ruthenium or an osmium-based catalyst such as described in CA 2246789; U.S. Pat. Nos. 5,728,785; 5,939,504; 6,020,443; 6,310,121; 6,323,296; 6,410,110; 6,750,272; 7,285,593; 7,339,006; and 7,700,698; U.S. Patent Application Publication Nos. 20090061713; 20090062441; 20090062446; 20090156726; and 20090156735; JP 2009143156; JP 2001026059; and WO 2011005136.
• DCPD dicyclopentadiene
• VNB stands for 5-vinyl-2-norbomene.
• the monomers used in the Examples include DCPD UPRG (83-88 wt % DCPD), DCPD HP (90-95 wt % DCPD), and Ultrene DCPD (>98 wt % DCPD).
• DCPD UPRG is UPR Grade and commercially available from The Dow Chemical Company.
• DCPD HP is DCPD High Purity Grade and commercially available from The Dow Chemical Company.
• Ultrene DCPD is a DCPD product commercially available from Cymetech.
• CAT1 (Structure I) is bis(tricyclohexylphosphine)[(phenylthio) methylene]ruthenium(II) dichloride and commercially available from Strem Chemicals, Inc.
• CAT2 (Structure II) is bis(tricyclohexylphosphine)-3-phenyl-1H-inden-1-ylideneruthenium(II) dichloride and commercially available from Strem Chemicals, Inc.
• DSC differential scanning calorimetry or calorimeter
• TGA thermogravimetric analysis
• a targeted wt % catalyst solution was prepared by adding an appropriate amount of a solid catalyst to methylcyclohexane (MCH) (which had previously been passed through a column of activated molecular sieves).
• MCH methylcyclohexane
• the catalyst mixture was added to a DCPD monomer after inserting a microliter pipetman tip into an actively stirring catalyst mixture to homogeneously disperse the catalyst in the MCH.
• a sample of approximately 6 mg to 9 mg was cut from a cured piece and loaded into an aluminum pan that was then hermetically sealed.
• the pan was loaded into an autosampler on a TA Instruments D200 DSC.
• the sample was cooled to 25° C., ramped at 10° C./min to 225° C., equilibrated again at 25° C., then ramped a second time to 225° C. at a rate of 10° C./min.
• a sample of approximately 7 mg to 10 mg were cut from a cured piece and loaded into a tared 100 ml platinum pan containing a disposable DSC aluminum pan.
• the pan was loaded into an autosampler on a TA Instruments Q5000 TGA.
• the sample was ramped at 10° C./min from ambient conditions to 350° C.
• DCPD HP grade 2.0 g was mixed overnight with 1.0 wt % Na silica gel Stage 1 (from SIGNa Chemistry, Inc. through Sigma-Aldrich), and then mixed overnight with 1.0 wt % NaO/Na on alumina (from SIGNa Chemistry, Inc. through Sigma-Aldrich), followed by filtration to form a treated sample of DCPD HP grade.
• each of the 2.0 g of treated DCPD HP grade was added to a 4 mL vial containing a stir bar.
• a CAT1 catalyst mixture was added (as a 10 wt % dispersion in methylcyclohexane) to the vial with stirring.
• the vial was sealed, removed from the glove box, and heated at 70° C. for two hours.
• the vial was then post-cured at 120° C. for two hours.
• the results of Examples 1 and 2 are described in Table I.
• Example 3 and 4 was carried out using the same procedure as described in Examples 1 and 2 above except that each of the 2.0 g of DCPD HP grade was first mixed overnight with 3.3 wt % Na silica gel Stage 1 (from SIGNa through Sigma-Aldrich), and then mixed overnight with 3.3 wt % NaO/Na on alumina (from SIGNa through Sigma-Aldrich), followed by filtration.
• the results of Examples 3 and 4 are described in Table I.
• This Comparative Example A was carried out using the same procedure as described in Examples land 2 above except that the 2.0 g of DCPD HP grade was not first treated overnight with 1.0 wt % Na silica gel Stage 1 or 1.0 wt % NaO/Na on alumina. Instead, the untreated 2.0 g of DCPD HP grade was added to a 4 mL vial containing a stir bar and prepared as described in Examples land 2 above. The results of this Comparative Example A are described in Table I.
• This Comparative Example B was carried out using the same procedure as described in Example 5 except that the 2.0 g of Ultrene DCPD grade was not first treated overnight with 3 wt % NaO/Na on alumina or the solids removed via filtration.
• the treatment of the DCPD using the process of the present invention allows the Tg of the system to be retained, similar to a control (Comparative Example B), despite the presence of an additive (VNB) which reduces the Tg (Comparative Example C). Also, the sample with VNB (Comparative Example C) is more brittle and prone to fracture, while the treatment of the present invention removes this behavior.
• Plaques containing untreated monomer (comparative examples) and treated monomer of the present invention (Example 6) were cast in a closed mold to produce plaques for mechanical testing.
• the formulation components are listed in Table III.
• the catalyst employed was CAT2, and the loadings are given in Table III.
• the molds were filled with the polymerizable formulation at 23° C. and then the molds were placed in a 50° C. oven for an hour. The oven temperature was then increased to 120° C. and the mold was left for 12 hours. The plaques were demolded after cooling the mold to room temperature.

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